Patents by Inventor Takanori Kumei

Takanori Kumei has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Copper alloy fastener element and slide fastener
    Patent number: 11246382
    Abstract: Provided is a copper alloy fastener element which improves season cracking resistance by a means different from that of increasing a ratio of a ? phase. The copper alloy fastener element includes a copper-zinc alloy as a base material, the base material having: an apparent zinc content of from 34 to 38%; a dendrite structure; and a ? phase at a ratio of 10% or less.
    Type: Grant
    Filed: October 30, 2020
    Date of Patent: February 15, 2022
    Assignee: YKK Corporation
    Inventors: Takanori Kumei, Atsushi Ogihara, Chikako Hiromi, Yoshio Taira, Muneyoshi Yokota, Takahiro Fukuyama, Kouta Kido
  • COPPER ALLOY FASTENER ELEMENT AND SLIDE FASTENER
    Publication number: 20210045502
    Abstract: Provided is a copper alloy fastener element which improves season cracking resistance by a means different from that of increasing a ratio of a ? phase. The copper alloy fastener element includes a copper-zinc alloy as a base material, the base material having: an apparent zinc content of from 34 to 38%; a dendrite structure; and a ? phase at a ratio of 10% or less.
    Type: Application
    Filed: October 30, 2020
    Publication date: February 18, 2021
    Inventors: Takanori Kumei, Atsushi Ogihara, Chikako Hiromi, Yoshio Taira, Muneyoshi Yokota, Takahiro Fukuyama, Kouta Kido
  • Copper alloy fastener element and slide fastener
    Patent number: 10918171
    Abstract: Provided is a copper alloy fastener element which improves season cracking resistance by a means different from that of increasing a ratio of a ? phase. The copper alloy fastener element includes a copper-zinc alloy as a base material, the base material having: an apparent zinc content of from 34 to 38%; a dendrite structure; and a ? phase at a ratio of 10% or less.
    Type: Grant
    Filed: July 26, 2016
    Date of Patent: February 16, 2021
    Inventors: Takanori Kumei, Atsushi Ogihara, Chikako Hiromi, Yoshio Taira, Muneyoshi Yokota, Takahiro Fukuyama, Kouta Kido
  • Copper Alloy Fastener Element and Slide Fastener
    Publication number: 20190269207
    Abstract: Provided is a copper alloy fastener element which improves season cracking resistance by a means different from that of increasing a ratio of a ? phase. The copper alloy fastener element includes a copper-zinc alloy as a base material, the base material having: an apparent zinc content of from 34 to 38%; a dendrite structure; and a ? phase at a ratio of 10% or less.
    Type: Application
    Filed: July 26, 2016
    Publication date: September 5, 2019
    Inventors: Takanori Kumei, Atsushi Ogihara, Chikako Hiromi, Yoshio Taira, Muneyoshi Yokota, Takahiro Fukuyama, Kouta Kido
  • Metallic fastener member having light gold color, and fastener provided therewith
    Patent number: 10161019
    Abstract: A metallic fastener member has a specific color of light gold and also has high strength, discoloration resistance and high workability to withstand practical use. A metallic fastener member including a base material of a copper alloy having composition containing 1 to 30% by mass of Zn and 1 to 11% by mass of Ni, the balance being Cu and inevitable impurities, wherein the metallic fastener member has a Vickers hardness of Hv 120 or more and less than Hv 220.
    Type: Grant
    Filed: December 26, 2014
    Date of Patent: December 25, 2018
    Assignee: YKK Corporation
    Inventors: Yasuharu Yoshimura, Takahiro Fukuyama, Kousuke Seki, Atsushi Ogihara, Chikako Hiromi, Takuya Koizumi, Itaru Hasegawa, Kazuya Akitsu, Takanori Kumei, Kouta Kido
  • Metallic Fastener Member Having Light Gold Color, and Fastener Provided Therewith
    Publication number: 20170349976
    Abstract: Provided is a metallic fastener member which has a specific color, i.e., a light gold color, and has all of practical strength, unsusceptibility to discoloration, and processability. The metallic fastener member comprises, as the base material, a copper alloy having a composition which contains 1-30 mass % Zn and 1-11 mass % Ni, with the remainder comprising Cu and unavoidable impurities, and has a Vickers hardness of 120 Hv or greater but less than 220 Hv.
    Type: Application
    Filed: December 26, 2014
    Publication date: December 7, 2017
    Inventors: Yasuharu Yoshimura, Takahiro Fukuyama, Kousuke Seki, Atsushi Ogihara, Chikako Hiromi, Takuya Koizumi, Itaru Hasegawa, Kazuya Akitsu, Takanori Kumei, Kouta Kido